Around 2008–2012, the market flooded with counterfeit Prolific PL-2303 chips—especially the PL-2303HX (rev A). These fake chips did not fully comply with Prolific’s specifications. To protect their revenue, Prolific released driver updates (versions 3.3.11 and above) that deliberately disabled functionality for counterfeit chips. When you plug in a clone adapter, Windows would show:
Thus, is the "golden build" that balances compatibility and functionality. Prolific Usb-to-serial Comm Port Version 3.3.3.114 1699
If your adapter shows a yellow exclamation mark in Device Manager, follow these steps to use this version: When you plug in a clone adapter, Windows
If you have a Prolific PL2303 chip, versions above 3.3.x might not work with counterfeit chips. Version 3.3.3.114 was commonly used with: Windows would show: Thus
Prolific's newer drivers are designed to detect and disable counterfeit or "cloned" chips common in cheap third-party adapters.
Around 2008–2012, the market flooded with counterfeit Prolific PL-2303 chips—especially the PL-2303HX (rev A). These fake chips did not fully comply with Prolific’s specifications. To protect their revenue, Prolific released driver updates (versions 3.3.11 and above) that deliberately disabled functionality for counterfeit chips. When you plug in a clone adapter, Windows would show:
Thus, is the "golden build" that balances compatibility and functionality.
If your adapter shows a yellow exclamation mark in Device Manager, follow these steps to use this version:
If you have a Prolific PL2303 chip, versions above 3.3.x might not work with counterfeit chips. Version 3.3.3.114 was commonly used with:
Prolific's newer drivers are designed to detect and disable counterfeit or "cloned" chips common in cheap third-party adapters.